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    • 31. 发明授权
    • Adjustable feed block for coextrusion die
    • 共挤出模具可调进料块
    • US4690628A
    • 1987-09-01
    • US785591
    • 1985-10-08
    • Claude DehennauPaul Dubois
    • Claude DehennauPaul Dubois
    • B29C47/04B29C47/06B29C47/12B29C47/16B29C47/58B29C47/92B29L31/30
    • B29C47/56B29C47/0816B29C47/16B29C47/0009B29C47/0019B29C47/064
    • An adjustable feed block for a coextrusion die is provided. The feed block comprises a main central channel for conveying a main stream of molten thermoplastic material towards a coextrusion die, and at least one secondary channel, substantially parallel to the central channel, for conveying a second molten thermoplastic intended to form a local coating layer on the main stream. The downstream end of each secondary channel is inclined relative to the central channel and connected to a portion of the periphery of the said channel. The connection between the central channel and each secondary channel is laterally delimited by the ends of two adjustable slides which can be moved at right angles to the axis of the central channel. These slides make it possible to adjust, during operation, the position and width of the streams of thermoplastic deposited on the main stream. Preferably, each secondary channel is subdivided into two curved branches which join together again upstream of the connection to the central channel, in such a way as to form an angle substantially equal to 180.degree. between them. Each secondary channel can be equipped with an adjustable distributor. The novel feed block is particularly suitable for coextrusion of profiles such as profiles for door frames or window frames.
    • 提供了一种用于共挤出模头的可调进给块。 进料块包括主中心通道,用于将熔融热塑性材料的主流朝向共挤出模具输送,以及至少一个与中心通道平行的第二通道,用于将用于形成局部涂层的第二熔融热塑料输送到 主流。 每个次级通道的下游端相对于中心通道倾斜并且连接到所述通道的外围的一部分。 中央通道和每个次级通道之间的连接由两个可调节的滑块的端部横向限定,两个可调节的滑块可以与中心通道的轴线成直角移动。 这些滑块使得可以在操作期间调整沉积在主流上的热塑性流的位置和宽度。 优选地,每个次级通道被细分为两个弯曲的分支,其在与中心通道的连接的上游再次连接在一起,以便在它们之间形成基本上等于180°的角度。 每个辅助通道都可以配备可调式分配器。 新型进料块特别适用于型材的共挤出,例如门框或窗框的轮廓。
    • 34. 发明授权
    • Device for the coextrusion of thermoplastics
    • 热塑性塑料共挤出装置
    • US4657497A
    • 1987-04-14
    • US800899
    • 1985-11-22
    • Claude DehennauMarc KergerLeon Dubuisson
    • Claude DehennauMarc KergerLeon Dubuisson
    • B29C47/06B29C47/22
    • B29C47/128B29C47/065B29C47/145B29C47/22B29C47/0019B29C47/0021B29C47/0026
    • A device for avoiding flow disturbances and stagnation during the production of hollow or solid multilayer elongate structures. The device for the coextrusion of thermoplastics comprises an elongate central core and an external structure surrounding the central core and defining, with the latter, a central extrusion channel which runs in the direction of the longitudinal axis of the device towards an outlet orifice, in which device the external structure consists of at least one element, each element comprising a toroid feed chamber surrounding the central extrusion channel and connected to a feed source of molten thermoplastic, with an extrusion passage having an external wall and connecting the periphery of the toroid feed chamber to the central extrusion channel, and with an adjustment ring, movable transversely relative to the longitudinal axis of the device, to provide control of the flux of molten thermoplastic flowing from the toroid feed chamber to the central extrusion channel, characterized in that each adjustment ring delimits in combination a portion of the toroid feed chamber in its part which is connected to the extrusion passage and a portion of the external wall of the extrusion passage in its part which is connected to the toroid feed chamber, the other portion of the external wall of the extrusion passage connected to the central extrusion channel being delimited by an internal face of a mandrel which surrounds the central extrusion channel and against which mandrel the adjustment ring can move transversely.
    • 一种用于在生产中空或固体多层细长结构期间避免流动干扰和停滞的装置。 用于热塑性塑料共挤出的装置包括细长的中心芯和围绕中心芯的外部结构,并且与外部结构相隔一定的中心挤出通道,该中心挤出通道沿装置的纵向轴线朝向出口孔延伸,其中 装置的外部结构由至少一个元件组成,每个元件包括围绕中心挤出通道并连接到熔融热塑性材料的进料源的环形进料室,挤出通道具有外壁并连接环形进料室的周边 并且具有相对于装置的纵向轴线横向移动的调节环,以提供从环形进料室流向中心挤出通道的熔融热塑性流体的控制,其特征在于每个调节环 在其中的c部分中组合环形进料室的一部分 连接到挤出通道和挤出通道的外壁的连接到环形进料室的部分,挤出通道的外壁的连接到中心挤出通道的另一部分由内部 围绕中心挤出通道的心轴的表面,并且调节环可绕该心轴横向移动。